Attaching-plug for electric wires.



No. 68I,46l. Patented Aug. 27, I90l. L. H. STUART.

ATTAGHING PLUG FDR ELECTRIC WIRES.

(Application filed May 1, 1901.)

(No Model.)

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UNITED STATES PATENT OFFICE.

LUTTRELL H. STUART, OF CHICAGO, ILLINOIS.

ATTACHING-PLUG FOR ELECTRIC WIRES.

SPEGIFICATION formingpart of Letters Patent No. 681,461, dated August 27, 1901.

Application filed May 1, 1901. Serial No. 58,294. (No model.)

To all whom it may concern.-

Be it known that I, LUTTRELL H. STUART, a citizen of the United States, residing at Ohicago, in the county of Cook and State of lllinois, have invented certain new and useful Improvements in Attaching-Plugs for Electric Wires; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the figures of reference marked thereon, which form a part of this specification.

My invention relates to attaching-plugs for electric wires, and particularly to plugs used in connection with electric lamps.

One objectis to construct an attaching-plug by means of which wires may be connected to an ordinary electric-lamp socket or fixture, so as to permit the lamp to be moved about or used away from the socket.

A further object is to provide means for doing this without twisting the wires, which is inconvenient and apt to injure or break the wires and interrupt the circuit. 7

The drawings illustrate the invention as applied to an ordinary Thomson-Houston lamp-socket.

Figure l is a plan view with the socket partly broken away. Fig. 2 is a longitudinal section showing the plug detached, part of the socket being. broken away. Fig. 3 is a plan view of the inner face of the plug; and Fig. 4 is a sectional plan on the line 4 4, Fig. 2.

The socket is indicated at 5, having the usual metallic ring 6, forming one terminal, and the externally-sorew-threaded extension 12, forming the other terminal. My plug is formed of two parts or blocks of insulating material, the inner block 7 connecting with the socket and the outer or wirecarrying block 7 a connecting with the wires. These blocks are connected rotatably relative to each other by an axial screw-rod 14, passing loosely through both blocks.

The inner face of the block 7 is provided with a metallic ring 8, adapted to contact with the ring 6 of the socket, and is also provided with a squared metallic block 13, which is loosely seated in the plug and is internally-screwthreaded'to receive the extension 12 of the socket and connects withthe inner end of the rod 14, which extends loosely through both may be connected one of the-circuit-wires.

The other terminal 16 is connected to the rod 14.

a In use the plug is placed within the socket, and the inner block 7 is screwed upon the extension 12. This has the effect, when the rings I 6 and 8 come together, of drawing and binding the parts of the plug together by means of the rod 14, loosely extending through the blocks, and causes close contact between the rings 9 and 10 and 6 and 8. It will be seen that when the block 7 is turned the rod 14 turns in the outer block 7, which remains stationary, and consequently the wires at tached thereto are not twisted. The current can pass from the terminal ring 6 through the ring 8, rod 15, rings 9 and 10, and rod 17 to the terminal 11 and from the terminal 12 through the block 13 and rod 14 to the terminal 16.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. An attaching-plug for electric wires comprising two blocks of non-conducting material, one of which is rotatable relative to the other, and two insulated circuit-conductors extending through both blocks.

2. An attaching-plug forelectric wires comprising two blocks of non-conducting material, one of which is rotatable relative to the other, a connecting-rod passing through both blocks and forming one circuit-conductor,and rods passing through each block and adapted to electrically contact and form the other circuit-conductor. I

3. An attaching plug for electric wires formed of two blocks of non-conducting material one of which is adapted to turn upon a rod extending through both blocks, which rod forms one circuit-conductor, contact-rings on the contiguous faces of the blocks, and conducting-rods connected to the rings and extending through the blocks and forming the other circuit-conductor.

4. An attaching-plug for electric wires comadapted to form electric connection with the 1 prising a block of non-conducting material conducting-rod of the other block. having therod 14 extending therethrough and In testimony whereof I aifix my signature adapted to engage one socket-terminal, and in presence of two witnesses.

5 having a. conductin -rod and contact-ring r n adapted to engage th e other socket-terminal, LU FTRELL STUARI' and a wire-carrying block of non-conducting WVitne'sses: n material rotatably mounted on the rod 14, V. J. ROBINSON,

having a conducting-rod and contact-ring HARRY G. BATOHELOR. 

